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LT3742 Datasheet 2-phase Step-down Switching Controller

Manufacturer: Linear Technology Corporation

General Description

The LT®3742 is a dual step-down DC/DC switching regulator controller that drives high side N-channel power MOSFETs.

A 500kHz fixed frequency current mode architecture provides fast transient response with simple loop pensation ponents and cycle-by-cycle current limiting.

The output stages of the two controllers operate 180° out of phase to reduce the input ripple current, minimizing the noise induced on the input supply, and allowing less input capacitance.

Key Features

  • n Wide Input Voltage Range: 4V to 30V n Wide Output Voltage Range: 0.8V to VIN n Low Shutdown IQ: 20µA n Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n 0.8V ±1.5% Voltage Reference n 500kHz Current Mode Fixed Frequency Operation n Internal Boost Converter Provides Bias Rail for N-channel MOSFET Gate Drive n Power Good Voltage Monitor for Each Output n Programmable Soft-Start n 24-Lead 4mm × 4mm × 0.75mm Package.

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